/*
* Mount an automounter directory.
* The automounter is connected into the system
* as a user-level NFS server. mount_amfs_toplvl constructs
* the necessary NFS parameters to be given to the
* kernel so that it will talk back to us.
*
* NOTE: automounter mounts in themselves are using NFS Version 2.
*/
static int
mount_amfs_toplvl(char *dir, char *opts)
{
char fs_hostname[MAXHOSTNAMELEN + MAXPATHLEN + 1];
int retry, error, genflags;
mntent_t mnt;
nfs_args_t nfs_args;
am_nfs_fh *fhp;
am_nfs_handle_t anh;
MTYPE_TYPE type = MOUNT_TYPE_NFS;
#ifndef HAVE_TRANSPORT_TYPE_TLI
u_short port;
struct sockaddr_in sin;
#endif /* not HAVE_TRANSPORT_TYPE_TLI */
memset((voidp) &mnt, 0, sizeof(mnt));
mnt.mnt_dir = dir;
mnt.mnt_fsname = pid_fsname;
mnt.mnt_opts = opts;
/*
* Make sure that amd's top-level NFS mounts are hidden by default
* from df.
* If they don't appear to support the either the "ignore" mnttab
* option entry, or the "auto" one, set the mount type to "nfs".
*/
mnt.mnt_type = HIDE_MOUNT_TYPE;
retry = hasmntval(&mnt, MNTTAB_OPT_RETRY);
if (retry <= 0)
retry = 2; /* XXX */
/*
* SET MOUNT ARGS
*/
/*
* get fhandle of remote path for automount point
*/
fhp = root_fh(dir);
if (!fhp) {
plog(XLOG_FATAL, "Can't find root file handle for %s", dir);
return EINVAL;
}
#ifndef HAVE_TRANSPORT_TYPE_TLI
/*
* Create sockaddr to point to the local machine. 127.0.0.1
* is not used since that will not work in HP-UX clusters and
* this is no more expensive.
*/
memset((voidp) &sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_addr = myipaddr;
port = hasmntval(&mnt, MNTTAB_OPT_PORT);
if (port) {
sin.sin_port = htons(port);
} else {
plog(XLOG_ERROR, "no port number specified for %s", dir);
return EINVAL;
}
#endif /* not HAVE_TRANSPORT_TYPE_TLI */
/*
* Make a ``hostname'' string for the kernel
*/
sprintf(fs_hostname, "pid%ld@%s:%s",
(long) (foreground ? am_mypid : getppid()),
am_get_hostname(),
dir);
/*
* Most kernels have a name length restriction (64 bytes)...
*/
if (strlen(fs_hostname) >= MAXHOSTNAMELEN)
strcpy(fs_hostname + MAXHOSTNAMELEN - 3, "..");
#ifdef HOSTNAMESZ
/*
* ... and some of these restrictions are 32 bytes (HOSTNAMESZ)
* If you need to get the definition for HOSTNAMESZ found, you may
* add the proper header file to the conf/nfs_prot/nfs_prot_*.h file.
*/
if (strlen(fs_hostname) >= HOSTNAMESZ)
strcpy(fs_hostname + HOSTNAMESZ - 3, "..");
#endif /* HOSTNAMESZ */
/*
* Finally we can compute the mount genflags set above,
* and add any automounter specific flags.
*/
genflags = compute_mount_flags(&mnt);
genflags |= compute_automounter_mount_flags(&mnt);
/* setup the many fields and flags within nfs_args */
memmove(&anh.v2.fhs_fh, fhp, sizeof(*fhp));
#ifdef HAVE_TRANSPORT_TYPE_TLI
compute_nfs_args(&nfs_args,
&mnt,
genflags,
nfsncp,
NULL, /* remote host IP addr is set below */
NFS_VERSION, /* version 2 */
"udp",
&anh,
fs_hostname,
pid_fsname);
/*
* IMPORTANT: set the correct IP address AFTERWARDS. It cannot
* be done using the normal mechanism of compute_nfs_args(), because
* that one will allocate a new address and use NFS_SA_DREF() to copy
* parts to it, while assuming that the ip_addr passed is always
* a "struct sockaddr_in". That assumption is incorrect on TLI systems,
* because they define a special macro HOST_SELF which is DIFFERENT
* than localhost (127.0.0.1)!
*/
nfs_args.addr = &nfsxprt->xp_ltaddr;
#else /* not HAVE_TRANSPORT_TYPE_TLI */
compute_nfs_args(&nfs_args,
&mnt,
genflags,
&sin,
NFS_VERSION, /* version 2 */
"udp",
&anh,
fs_hostname,
pid_fsname);
#endif /* not HAVE_TRANSPORT_TYPE_TLI */
/*************************************************************************
* NOTE: while compute_nfs_args() works ok for regular NFS mounts *
* the toplvl one is not, and so some options must be corrected by hand *
* more carefully, *after* compute_nfs_args() runs. *
*************************************************************************/
compute_automounter_nfs_args(&nfs_args, &mnt);
/* This is it! Here we try to mount amd on its mount points */
#ifdef DEBUG
amuDebug(D_TRACE) {
print_nfs_args(&nfs_args, 0);
plog(XLOG_DEBUG, "Generic mount flags 0x%x", genflags);
}
#endif /* DEBUG */
error = mount_fs(&mnt, genflags, (caddr_t) &nfs_args, retry, type,
0, NULL, mnttab_file_name);
#ifdef HAVE_TRANSPORT_TYPE_TLI
free_knetconfig(nfs_args.knconf);
/*
* local automounter mounts do not allocate a special address, so
* no need to XFREE(nfs_args.addr) under TLI.
*/
#endif /* HAVE_TRANSPORT_TYPE_TLI */
return error;
}
int
main(int argc, char *argv[])
{
char *dot;
char *mntopts = (char *) NULL;
char hostpid_fs[MAXHOSTNAMELEN + 1 + 16]; /* room for ":(pid###)" */
char progpid_fs[PROGNAMESZ + 1 + 11]; /* room for ":pid" */
char preopts[128];
char *progname;
int forcecache = 0;
int forcefast = 0;
int genflags = 0;
int opt, ret;
int opterrs = 0;
int retry;
int soNFS; /* NFS socket */
int s = -99;
mntent_t mnt;
nfs_args_t nfs_args;
am_nfs_handle_t anh;
struct dirent *direntry;
struct group *grp;
struct stat stmodes;
DIR *mountdir;
MTYPE_TYPE type = MOUNT_TYPE_NFS;
#ifdef HAVE_SIGACTION
struct sigaction sa;
#endif /* not HAVE_SIGACTION */
#ifndef HAVE_TRANSPORT_TYPE_TLI
struct sockaddr_in localsocket;
#endif /* not HAVE_TRANSPORT_TYPE_TLI */
/* get program name and truncate so we don't overflow progpid_fs */
if ((progname = strrchr(argv[0], '/')) != NULL)
progname++;
else
progname = argv[0];
if ((int) strlen(progname) > PROGNAMESZ) /* truncate to reasonable size */
progname[PROGNAMESZ] = '\0';
am_set_progname(progname);
while ((opt = getopt(argc, argv, "a:c:CD:fg:hi:l:no:pP:x:v")) != -1)
switch (opt) {
case 'a':
if (!optarg || optarg[0] != '/') {
printf("%s: invalid directory for -a: %s\n",
am_get_progname(), optarg);
exit(3);
}
alt_spooldir = optarg;
break;
case 'c':
if (!atoi(optarg)) {
printf("%s: invalid interval for -c: %s\n",
am_get_progname(), optarg);
exit(3);
}
cache_interval = atoi(optarg);
break;
case 'C':
forcecache++;
break;
case 'f':
forcefast++;
break;
case 'g':
hlfs_group = optarg;
break;
case 'i':
if (!atoi(optarg)) {
printf("%s: invalid interval for -i: %s\n",
am_get_progname(), optarg);
exit(3);
}
reloadinterval.it_interval.tv_sec = atoi(optarg);
reloadinterval.it_value.tv_sec = atoi(optarg);
break;
case 'l':
logfile = optarg;
break;
case 'n':
noverify++;
break;
case 'o':
mntopts = optarg;
break;
case 'p':
printpid++;
break;
case 'P':
passwdfile = optarg;
break;
case 'v':
fprintf(stderr, "%s\n", HLFSD_VERSION);
exit(0);
case 'x':
opterrs += switch_option(optarg);
break;
case 'D':
#ifdef DEBUG
opterrs += debug_option(optarg);
#else /* not DEBUG */
fprintf(stderr, "%s: not compiled with DEBUG -- sorry.\n", am_get_progname());
#endif /* not DEBUG */
break;
case 'h':
case '?':
opterrs++;
}
/* set some default debugging options */
if (xlog_level_init == ~0)
switch_option("");
/* need my pid before any dlog/plog */
am_set_mypid();
#ifdef DEBUG
switch_option("debug");
#endif /* DEBUG */
/*
* Terminate if did not ask to forcecache (-C) and hlfsd would not be able
* to set the minimum cache intervals.
*/
#if !defined(MNT2_NFS_OPT_ACREGMIN) && !defined(MNT2_NFS_OPT_NOAC) && !defined(HAVE_NFS_ARGS_T_ACREGMIN)
if (!forcecache) {
fprintf(stderr, "%s: will not be able to turn off attribute caches.\n", am_get_progname());
exit(1);
}
#endif /* !defined(MNT2_NFS_OPT_ACREGMIN) && !defined(MNT2_NFS_OPT_NOAC) && !defined(HAVE_NFS_ARGS_T_ACREGMIN) */
switch (argc - optind) {
case 2:
home_subdir = argv[optind + 1];
case 1:
dir_name = argv[optind];
case 0:
break;
default:
opterrs++;
}
if (opterrs)
usage();
/* ensure that only root can run hlfsd */
if (geteuid()) {
fprintf(stderr, "hlfsd can only be run as root\n");
exit(1);
}
setbuf(stdout, (char *) NULL);
umask(0);
/* find gid for hlfs_group */
if ((grp = getgrnam(hlfs_group)) == (struct group *) NULL) {
fprintf(stderr, "%s: cannot get gid for group \"%s\".\n",
am_get_progname(), hlfs_group);
} else {
hlfs_gid = grp->gr_gid;
}
/* get hostname for logging and open log before we reset umask */
gethostname(hostname, sizeof(hostname));
hostname[sizeof(hostname) - 1] = '\0';
if ((dot = strchr(hostname, '.')) != NULL)
*dot = '\0';
orig_umask = umask(0);
if (logfile)
switch_to_logfile(logfile, orig_umask);
#if defined(DEBUG) && !defined(MOUNT_TABLE_ON_FILE)
if (debug_flags & D_MTAB)
dlog("-D mtab option ignored");
#endif /* defined(DEBUG) && !defined(MOUNT_TABLE_ON_FILE) */
/* avoid hanging on other NFS servers if started elsewhere */
if (chdir("/") < 0)
fatal("cannot chdir to /: %m");
if (geteuid() != 0)
fatal("must be root to mount filesystems");
/*
* dir_name must match "^(/.*)/([^/]+)$", and is split at last '/' with
* slinkname = `basename $dir_name` - requires dir_name be writable
*/
if (dir_name[0] != '/'
|| ((slinkname = strrchr(dir_name, '/')), *slinkname++ = '\0',
(dir_name[0] == '\0' || slinkname[0] == '\0'))) {
if (slinkname)
*--slinkname = '/';
printf("%s: invalid mount directory/link %s\n",
am_get_progname(), dir_name);
exit(3);
}
clock_valid = 0; /* invalidate logging clock */
if (!forcefast) {
/* make sure mount point exists and is at least mode 555 */
if (stat(dir_name, &stmodes) < 0)
if (errno != ENOENT || mkdirs(dir_name, 0555) < 0
|| stat(dir_name, &stmodes) < 0)
fatalerror(dir_name);
if ((stmodes.st_mode & 0555) != 0555) {
fprintf(stderr, "%s: directory %s not read/executable\n",
am_get_progname(), dir_name);
plog(XLOG_WARNING, "directory %s not read/executable",
dir_name);
}
/* warn if extraneous stuff will be hidden by mount */
if ((mountdir = opendir(dir_name)) == NULL)
fatalerror(dir_name);
while ((direntry = readdir(mountdir)) != NULL) {
if (!NSTREQ(".", direntry->d_name, NAMLEN(direntry)) &&
!NSTREQ("..", direntry->d_name, NAMLEN(direntry)) &&
!NSTREQ(slinkname, direntry->d_name, NAMLEN(direntry)))
break;
}
if (direntry != NULL) {
fprintf(stderr, "%s: %s/%s will be hidden by mount\n",
am_get_progname(), dir_name, direntry->d_name);
plog(XLOG_WARNING, "%s/%s will be hidden by mount\n",
dir_name, direntry->d_name);
}
closedir(mountdir);
/* make sure alternate spool dir exists */
if ((errno = mkdirs(alt_spooldir, OPEN_SPOOLMODE))) {
fprintf(stderr, "%s: cannot create alternate dir ",
am_get_progname());
perror(alt_spooldir);
plog(XLOG_ERROR, "cannot create alternate dir %s: %m",
alt_spooldir);
}
chmod(alt_spooldir, OPEN_SPOOLMODE);
/* create failsafe link to alternate spool directory */
slinkname[-1] = '/'; /* unsplit dir_name to include link */
if (lstat(dir_name, &stmodes) == 0 &&
(stmodes.st_mode & S_IFMT) != S_IFLNK) {
fprintf(stderr, "%s: failsafe %s not a symlink\n",
am_get_progname(), dir_name);
plog(XLOG_WARNING, "failsafe %s not a symlink\n",
dir_name);
} else {
unlink(dir_name);
if (symlink(alt_spooldir, dir_name) < 0) {
fprintf(stderr,
"%s: cannot create failsafe symlink %s -> ",
am_get_progname(), dir_name);
perror(alt_spooldir);
plog(XLOG_WARNING,
"cannot create failsafe symlink %s -> %s: %m",
dir_name, alt_spooldir);
}
}
slinkname[-1] = '\0'; /* resplit dir_name */
} /* end of "if (!forcefast) {" */
/*
* Register hlfsd as an nfs service with the portmapper.
*/
#ifdef HAVE_TRANSPORT_TYPE_TLI
ret = create_nfs_service(&soNFS, &nfs_port, &nfsxprt, nfs_program_2);
#else /* not HAVE_TRANSPORT_TYPE_TLI */
ret = create_nfs_service(&soNFS, &nfs_port, &nfsxprt, nfs_program_2);
#endif /* not HAVE_TRANSPORT_TYPE_TLI */
if (ret != 0)
fatal("cannot create NFS service");
#ifdef HAVE_SIGACTION
sa.sa_handler = proceed;
sa.sa_flags = 0;
sigemptyset(&(sa.sa_mask));
sigaddset(&(sa.sa_mask), SIGUSR2);
sigaction(SIGUSR2, &sa, NULL);
#else /* not HAVE_SIGACTION */
signal(SIGUSR2, proceed);
#endif /* not HAVE_SIGACTION */
plog(XLOG_INFO, "Initializing hlfsd...");
hlfsd_init(); /* start up child (forking) to run svc_run */
#ifdef HAVE_SIGACTION
sa.sa_handler = reaper;
sa.sa_flags = 0;
sigemptyset(&(sa.sa_mask));
sigaddset(&(sa.sa_mask), SIGCHLD);
sigaction(SIGCHLD, &sa, NULL);
#else /* not HAVE_SIGACTION */
signal(SIGCHLD, reaper);
#endif /* not HAVE_SIGACTION */
#ifdef DEBUG
/*
* In the parent, if -D nodaemon (or -D daemon) , we don't need to
* set this signal handler.
*/
amuDebug(D_DAEMON) {
#endif /* DEBUG */
/* XXX: port to use pure svr4 signals */
s = -99;
while (stoplight != SIGUSR2) {
plog(XLOG_INFO, "parent waits for child to setup (stoplight=%d)", stoplight);
s = sigpause(0); /* wait for child to set up */
sleep(1);
}
#ifdef DEBUG
}
#endif /* DEBUG */
/*
* setup options to mount table (/etc/{mtab,mnttab}) entry
*/
sprintf(hostpid_fs, "%s:(pid%d)", hostname, masterpid);
memset((char *) &mnt, 0, sizeof(mnt));
mnt.mnt_dir = dir_name; /* i.e., "/mail" */
mnt.mnt_fsname = hostpid_fs;
if (mntopts) {
mnt.mnt_opts = mntopts;
} else {
strcpy(preopts, default_mntopts);
/*
* Turn off all kinds of attribute and symlink caches as
* much as possible. Also make sure that mount does not
* show up to df.
*/
#ifdef MNTTAB_OPT_INTR
strcat(preopts, ",");
strcat(preopts, MNTTAB_OPT_INTR);
#endif /* MNTTAB_OPT_INTR */
#ifdef MNTTAB_OPT_IGNORE
strcat(preopts, ",");
strcat(preopts, MNTTAB_OPT_IGNORE);
#endif /* MNTTAB_OPT_IGNORE */
#ifdef MNT2_GEN_OPT_CACHE
strcat(preopts, ",nocache");
#endif /* MNT2_GEN_OPT_CACHE */
#ifdef MNT2_NFS_OPT_SYMTTL
strcat(preopts, ",symttl=0");
#endif /* MNT2_NFS_OPT_SYMTTL */
mnt.mnt_opts = preopts;
}
/*
* Make sure that amd's top-level NFS mounts are hidden by default
* from df.
* If they don't appear to support the either the "ignore" mnttab
* option entry, or the "auto" one, set the mount type to "nfs".
*/
#ifdef HIDE_MOUNT_TYPE
mnt.mnt_type = HIDE_MOUNT_TYPE;
#else /* not HIDE_MOUNT_TYPE */
mnt.mnt_type = "nfs";
#endif /* not HIDE_MOUNT_TYPE */
/* some systems don't have a mount type, but a mount flag */
#ifndef HAVE_TRANSPORT_TYPE_TLI
amu_get_myaddress(&localsocket.sin_addr);
localsocket.sin_family = AF_INET;
localsocket.sin_port = htons(nfsxprt->xp_port);
#endif /* not HAVE_TRANSPORT_TYPE_TLI */
/*
* Update hostname field.
* Make some name prog:pid (i.e., hlfsd:174) for hostname
*/
sprintf(progpid_fs, "%s:%d", am_get_progname(), masterpid);
/* Most kernels have a name length restriction. */
if ((int) strlen(progpid_fs) >= (int) MAXHOSTNAMELEN)
strcpy(progpid_fs + MAXHOSTNAMELEN - 3, "..");
genflags = compute_mount_flags(&mnt);
retry = hasmntval(&mnt, MNTTAB_OPT_RETRY);
if (retry <= 0)
retry = 1; /* XXX */
memmove(&anh.v2.fhs_fh, root_fhp, sizeof(*root_fhp));
#ifdef HAVE_TRANSPORT_TYPE_TLI
compute_nfs_args(&nfs_args,
&mnt,
genflags,
nfsncp,
NULL, /* remote host IP addr is set below */
NFS_VERSION, /* version 2 */
"udp", /* XXX: shouldn't this be "udp"? */
&anh,
progpid_fs, /* host name for kernel */
hostpid_fs); /* filesystem name for kernel */
/*
* IMPORTANT: set the correct IP address AFTERWARDS. It cannot
* be done using the normal mechanism of compute_nfs_args(), because
* that one will allocate a new address and use NFS_SA_DREF() to copy
* parts to it, while assuming that the ip_addr passed is always
* a "struct sockaddr_in". That assumption is incorrect on TLI systems,
* because they define a special macro HOST_SELF which is DIFFERENT
* than localhost (127.0.0.1)!
*/
nfs_args.addr = &nfsxprt->xp_ltaddr;
#else /* not HAVE_TRANSPORT_TYPE_TLI */
compute_nfs_args(&nfs_args,
&mnt,
genflags,
NULL,
&localsocket,
NFS_VERSION, /* version 2 */
"udp", /* XXX: shouldn't this be "udp"? */
&anh,
progpid_fs, /* host name for kernel */
hostpid_fs); /* filesystem name for kernel */
#endif /* not HAVE_TRANSPORT_TYPE_TLI */
/*************************************************************************
* NOTE: while compute_nfs_args() works ok for regular NFS mounts *
* the toplvl one is not, and so some options must be corrected by hand *
* more carefully, *after* compute_nfs_args() runs. *
*************************************************************************/
compute_automounter_nfs_args(&nfs_args, &mnt);
clock_valid = 0; /* invalidate logging clock */
/*
* The following code could be cleverly ifdef-ed, but I duplicated the
* mount_fs call three times for simplicity and readability.
*/
#ifdef DEBUG
/*
* For some reason, this mount may have to be done in the background, if I am
* using -D nodebug. I suspect that the actual act of mounting requires
* calling to hlfsd itself to invoke one or more of its nfs calls, to stat
* /mail. That means that even if you say -D nodaemon, at least the mount
* of hlfsd itself on top of /mail will be done in the background.
* The other alternative I have is to run svc_run, but set a special
* signal handler to perform the mount in N seconds via some alarm.
* -Erez Zadok.
*/
amuDebug(D_DAEMON) { /* asked for -D daemon */
plog(XLOG_INFO, "parent NFS mounting hlfsd service points");
if (mount_fs2(&mnt, dir_name, genflags, (caddr_t) &nfs_args, retry, type, 0, NULL, mnttab_file_name) < 0)
fatal("nfsmount: %m");
} else { /* asked for -D nodaemon */
if (fork() == 0) { /* child runs mount */
/*
* Mount an automounter directory.
* The automounter is connected into the system
* as a user-level NFS server. amfs_mount constructs
* the necessary NFS parameters to be given to the
* kernel so that it will talk back to us.
*
* NOTE: automounter mounts in themselves are using NFS Version 2 (UDP).
*
* NEW: on certain systems, mounting can be done using the
* kernel-level automount (autofs) support. In that case,
* we don't need NFS at all here.
*/
int
amfs_mount(am_node *mp, mntfs *mf, char *opts)
{
char fs_hostname[MAXHOSTNAMELEN + MAXPATHLEN + 1];
int retry, error = 0, genflags;
int on_autofs = mf->mf_flags & MFF_ON_AUTOFS;
char *dir = mf->mf_mount;
mntent_t mnt;
MTYPE_TYPE type;
int forced_unmount = 0; /* are we using forced unmounts? */
u_long nfs_version = get_nfs_dispatcher_version(nfs_dispatcher);
memset(&mnt, 0, sizeof(mnt));
mnt.mnt_dir = dir;
mnt.mnt_fsname = pid_fsname;
mnt.mnt_opts = opts;
#ifdef HAVE_FS_AUTOFS
if (mf->mf_flags & MFF_IS_AUTOFS) {
type = MOUNT_TYPE_AUTOFS;
/*
* Make sure that amd's top-level autofs mounts are hidden by default
* from df.
* XXX: It works ok on Linux, might not work on other systems.
*/
mnt.mnt_type = "autofs";
} else
#endif /* HAVE_FS_AUTOFS */
{
type = MOUNT_TYPE_NFS;
/*
* Make sure that amd's top-level NFS mounts are hidden by default
* from df.
* If they don't appear to support the either the "ignore" mnttab
* option entry, or the "auto" one, set the mount type to "nfs".
*/
mnt.mnt_type = HIDE_MOUNT_TYPE;
}
retry = hasmntval(&mnt, MNTTAB_OPT_RETRY);
if (retry <= 0)
retry = 2; /* XXX: default to 2 retries */
/*
* SET MOUNT ARGS
*/
/*
* Make a ``hostname'' string for the kernel
*/
xsnprintf(fs_hostname, sizeof(fs_hostname), "pid%ld@%s:%s",
get_server_pid(), am_get_hostname(), dir);
/*
* Most kernels have a name length restriction (64 bytes)...
*/
if (strlen(fs_hostname) >= MAXHOSTNAMELEN)
xstrlcpy(fs_hostname + MAXHOSTNAMELEN - 3, "..",
sizeof(fs_hostname) - MAXHOSTNAMELEN + 3);
#ifdef HOSTNAMESZ
/*
* ... and some of these restrictions are 32 bytes (HOSTNAMESZ)
* If you need to get the definition for HOSTNAMESZ found, you may
* add the proper header file to the conf/nfs_prot/nfs_prot_*.h file.
*/
if (strlen(fs_hostname) >= HOSTNAMESZ)
xstrlcpy(fs_hostname + HOSTNAMESZ - 3, "..",
sizeof(fs_hostname) - HOSTNAMESZ + 3);
#endif /* HOSTNAMESZ */
/*
* Finally we can compute the mount genflags set above,
* and add any automounter specific flags.
*/
genflags = compute_mount_flags(&mnt);
#ifdef HAVE_FS_AUTOFS
if (on_autofs)
genflags |= autofs_compute_mount_flags(&mnt);
#endif /* HAVE_FS_AUTOFS */
genflags |= compute_automounter_mount_flags(&mnt);
again:
if (!(mf->mf_flags & MFF_IS_AUTOFS)) {
nfs_args_t nfs_args;
am_nfs_handle_t *fhp, anh;
#ifndef HAVE_TRANSPORT_TYPE_TLI
u_short port;
struct sockaddr_in sin;
#endif /* not HAVE_TRANSPORT_TYPE_TLI */
/*
* get fhandle of remote path for automount point
*/
fhp = get_root_nfs_fh(dir, &anh);
if (!fhp) {
plog(XLOG_FATAL, "Can't find root file handle for %s", dir);
return EINVAL;
}
#ifndef HAVE_TRANSPORT_TYPE_TLI
/*
* Create sockaddr to point to the local machine.
*/
memset(&sin, 0, sizeof(sin));
/* as per POSIX, sin_len need not be set (used internally by kernel) */
sin.sin_family = AF_INET;
sin.sin_addr = myipaddr;
port = hasmntval(&mnt, MNTTAB_OPT_PORT);
if (port) {
sin.sin_port = htons(port);
} else {
plog(XLOG_ERROR, "no port number specified for %s", dir);
return EINVAL;
}
#endif /* not HAVE_TRANSPORT_TYPE_TLI */
/* setup the many fields and flags within nfs_args */
#ifdef HAVE_TRANSPORT_TYPE_TLI
compute_nfs_args(&nfs_args,
&mnt,
genflags,
nfsncp,
NULL, /* remote host IP addr is set below */
nfs_version,
"udp",
fhp,
fs_hostname,
pid_fsname);
/*
* IMPORTANT: set the correct IP address AFTERWARDS. It cannot
* be done using the normal mechanism of compute_nfs_args(), because
* that one will allocate a new address and use NFS_SA_DREF() to copy
* parts to it, while assuming that the ip_addr passed is always
* a "struct sockaddr_in". That assumption is incorrect on TLI systems,
* because they define a special macro HOST_SELF which is DIFFERENT
* than localhost (127.0.0.1)!
*/
nfs_args.addr = &nfsxprt->xp_ltaddr;
#else /* not HAVE_TRANSPORT_TYPE_TLI */
compute_nfs_args(&nfs_args,
&mnt,
genflags,
NULL,
&sin,
nfs_version,
"udp",
fhp,
fs_hostname,
pid_fsname);
#endif /* not HAVE_TRANSPORT_TYPE_TLI */
/*************************************************************************
* NOTE: while compute_nfs_args() works ok for regular NFS mounts *
* the toplvl one is not quite regular, and so some options must be *
* corrected by hand more carefully, *after* compute_nfs_args() runs. *
*************************************************************************/
compute_automounter_nfs_args(&nfs_args, &mnt);
if (amuDebug(D_TRACE)) {
print_nfs_args(&nfs_args, 0);
plog(XLOG_DEBUG, "Generic mount flags 0x%x", genflags);
}
/* This is it! Here we try to mount amd on its mount points */
error = mount_fs(&mnt, genflags, (caddr_t) &nfs_args,
retry, type, 0, NULL, mnttab_file_name, on_autofs);
#ifdef HAVE_TRANSPORT_TYPE_TLI
free_knetconfig(nfs_args.knconf);
/*
* local automounter mounts do not allocate a special address, so
* no need to XFREE(nfs_args.addr) under TLI.
*/
#endif /* HAVE_TRANSPORT_TYPE_TLI */
#ifdef HAVE_FS_AUTOFS
} else {
/* This is it! Here we try to mount amd on its mount points */
error = mount_fs(&mnt, genflags, (caddr_t) mp->am_autofs_fh,
retry, type, 0, NULL, mnttab_file_name, on_autofs);
#endif /* HAVE_FS_AUTOFS */
}
if (error == 0 || forced_unmount)
return error;
/*
* If user wants forced/lazy unmount semantics, then try it iff the
* current mount failed with EIO or ESTALE.
*/
if (gopt.flags & CFM_FORCED_UNMOUNTS) {
switch (errno) {
case ESTALE:
case EIO:
forced_unmount = errno;
plog(XLOG_WARNING, "Mount %s failed (%m); force unmount.", mp->am_path);
if ((error = UMOUNT_FS(mp->am_path, mnttab_file_name,
AMU_UMOUNT_FORCE | AMU_UMOUNT_DETACH)) < 0) {
plog(XLOG_WARNING, "Forced umount %s failed: %m.", mp->am_path);
errno = forced_unmount;
} else
goto again;
default:
break;
}
}
return error;
}